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Thread: New to site, problems, question on OCLT

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    New to site, problems, question on OCLT

    New to the site - post #1. After having maintained this pool for 10 years (it was 5 years old when we bought the house) I'm having my first year of problems...well, problems that I finally know about. Have been a 10 year Leslie's customer, using Chlorshock, Tabs and whatever else they told me to put in.

    Hopefully all information needed is correct in my signature. Pool just hasn't seemed right this year. I get full sun from about 10 am till the sun sets. The whole summer has been a battle (cloudy and algae) and the during the heat wave the last 2 weeks I've been unable to keep any chlorine in the pool. My response of course (per Leslies) was to cram the hopper full of tabs every day, turn it all the way up and shock every morning.

    So now I'm here...and embarassed...and ******.

    I've read the pool school files about 5 times each. I've ordered the Taylor kit. I've gone to Sams and bought a few packages of Clorox. I was already using Baking Soda. Planning on using the Soda Wash for PH once the CYA stops moving from all the **** I've put in.

    Chemically, I can't seem to keep chlorine, my ph has been off the charts low and, now that I actually even look at that last tab on the strip, my CYA is off the charts, about 150. I know the numbers on the stick are useless, test kit is on the way. I've already stopped with the tabs, pulled them all out and chucked in garbage. No more shock. Been pouring Clorox in and I can now see some chlorine in the pool. Water is starting to clear. On the stick the chlorine levels match (total not higher than free at any given time [testing 3 times a day] so presumably kinda clean). Ph keeps dropping, I'm sure that will continue until all the shock and tab chems have released in the next week. I'm aware I'll need to drop some water to get the CYA back. I replace about half each winter via draining and natural refill, so I'd like to not replace quite as much right now.

    All that said...my question on the OCLT is this. Do I HAVE to bring it to shock levels to actually execute the test? Lets say I bring it to 12 ppm, but with 100 CYA shock level is 29. Can I still be checking the next morning to see if it held above 11 and know it's cleaned up, or do you HAVE to get to the shock levels given? I'm just worried that I'll be putting too much bleach into the pool to actually reach that level, assuming I can even get it back down to 90/100 this year before closing it.

    Just a word of thanks also to all those that have put this site together. The amount of information here is amazing. I'm converted. Really amazing site!
    Neil

    22,000 gallon vinyl in ground (17ft x 33ft) built in 1996, Pentair Whisperflo 1HP [2007] running into a Pentair Sand Dollar SD80 (75 GPM flow) [2007] and Rheem 266A Digital Gas Heater [2013], Liquidator [2013], full sun. And a UDS.

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    Re: New to site, problems, question on OCLT

    Hi, Neil,

    Welcome to the forum. You already know this but I'll say it just for reinforcement. Battling your pool with CYA over about 60 is a nightmare. It sounds like you need to shock and the shock FC for CYA of 100 is around 40ppm!

    Bite the bullet and drain your pool to get CYA down to 60....It'll probably be cheaper than your intended plan.

    However, to answer your question, "No", you do not need to get to shock value to perform the OCLT....In theory you can do it at any level but 10ppm or so should tell you what you need.

    Now that I've answered your question, reread the part above that one more time.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    linen's Avatar
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    Re: New to site, problems, question on OCLT

    Welcome to tfp, Neil

    I am with duraleigh on this, get that cya down...but I might wait until your test kit arrives...just in case it is not as high as your suspect and the strips suggest.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: New to site, problems, question on OCLT

    Thanks Dave. Did you ship my kit today !

    I'm going to take a day at the end of next week and replace 1/4 of the water and see where that takes me. I promise! I just wanted to know if I could perform the test just to see if the pool is 'clean' or not without dumping in 80 gallons of Clorox!
    Neil

    22,000 gallon vinyl in ground (17ft x 33ft) built in 1996, Pentair Whisperflo 1HP [2007] running into a Pentair Sand Dollar SD80 (75 GPM flow) [2007] and Rheem 266A Digital Gas Heater [2013], Liquidator [2013], full sun. And a UDS.

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    Re: New to site, problems, question on OCLT

    Did you ship my kit today
    Well, I don't know your name but if the order was placed by 2:00PM EDT, the answer is, "Yes, it's on it's way" PM your last name to me if you want me to verify.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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